Structural, luminescent and magnetic studies of Mn(HPO4).3H2O
Language
en
Article de revue
This item was published in
Journal de Physique IV Proceedings. 2005, vol. vol. 123, p. p. 241-244
EDP Sciences
English Abstract
The Mn(HPO4).3H2O compound has been synthesized from a mixture of manganese(II) chloride tetrahydrate, phosphoric acid and water at pH=6. The compound was characterized from X-ray powder diffraction data by means of the ...Read more >
The Mn(HPO4).3H2O compound has been synthesized from a mixture of manganese(II) chloride tetrahydrate, phosphoric acid and water at pH=6. The compound was characterized from X-ray powder diffraction data by means of the Rietveld method. Its crystal structure consists of layers constructed from isolated MnO6 octahedra linked by the PO4 tetrahedra anions giving rise to chains. The thermogravimetric study indicates that the compound is stable up to 100°C. The IR spectrum confirms the presence of hydrogenphosphate anion. The Dq and Racah parameters have been calculated from the luminescent spectra of the Mn(II) cations. The magnetic measurements indicate the presence of mainly antiferromagnetic interactions with a weak ferromagnetism intrinsic to the compound below 7.9 K.Read less <
English Keywords
Mn(HPO4).3H2O
Phosphates
Luminescence
Chemical structure
Chemical analysis
Magnetism
Origin
Hal imported